We take the humble kettle for granted. But if you’ve ever poured a cup of coffee and ended up with a puddle on the counter, you’ve experienced bad physics.
The dribble is a design flaw
When a spout is too wide or angled incorrectly, water adheres to the outside of the metal (a phenomenon called the Coandă effect). Surface tension pulls the liquid around the curve instead of letting it drop cleanly.
This is why a standard electric kettle is terrible for pour-over coffee.
The gooseneck solution
A gooseneck spout has a narrow opening and a steep curve. This gives the water a clean break-off point, meaning you get a precise, controlled stream every time. It’s not just for coffee snobs — it’s objectively a better way to pour hot water without risking a splash.
If you’re buying a kettle, look for a spout that curves upward slightly at the very tip. It seems like a tiny detail, but it completely stops the countertop puddles.